Search Results - "Bernhard, J.T."

Directional Modulation Technique for Phased Arrays by Daly, M.P., Bernhard, J.T.

“…A directional modulation (DM) technique using a phased array to produce the modulation is presented. By phase shifting each element correctly, the desired…”
Get full text

Integration of packaged RF MEMS switches with radiation pattern reconfigurable square spiral microstrip antennas by Huff, G.H., Bernhard, J.T.

“…This work describes the integration of commercially available packaged radio frequency microelectromechanical system (RF MEMS) switches with radiation pattern…”
Get full text

Performance Study of Pattern Reconfigurable Antennas in MIMO Communication Systems by Boerman, J.D., Bernhard, J.T.

“…We explore the potential benefits of using pattern reconfigurable antennas in multiple-input multiple-output (MIMO) communication systems. First, theoretical…”
Get full text

A pattern reconfigurable microstrip parasitic array by Zhang, S., Huff, G.H., Feng, J., Bernhard, J.T.

“…This communication presents a novel linearly polarized pattern reconfigurable microstrip parasitic array. Specifically, this antenna uses four switches…”
Get full text

Analysis and design of broad-band single-layer rectangular U-slot microstrip patch antennas by Weigand, S., Huff, G.H., Pan, K.H., Bernhard, J.T.

“…A wide operating bandwidth for a single-layer coaxially fed rectangular microstrip patch antenna can be obtained by cutting a U-shaped slot on the patch. This…”
Get full text

A novel radiation pattern and frequency reconfigurable single turn square spiral microstrip antenna by Huff, G.H., Feng, J., Zhang, S., Bernhard, J.T.

“…This paper presents a novel pattern and frequency reconfigurable microstrip antenna that uses switched connections. The basic antenna operates with linear…”
Get full text

Sidelobe level and wideband behavior of arrays of random subarrays by Kerby, K.C., Bernhard, J.T.

“…We propose an extension to the concept of random antenna arrays. Three new array geometries are introduced which are intended to incorporate the wide bandwidth…”
Get full text

Directional reconfigurable antennas on laptop computers: Simulation, measurement and evaluation of candidate integration positions by Huff, G.H., Feng, J., Shenghui Zhang, Cung, G., Bernhard, J.T.

“…This study reports on the integration of a novel reconfigurable microstrip antenna capable of reconfiguring both its radiation pattern and frequency response…”
Get full text

Micromachined reconfigurable out-of-plane microstrip patch antenna using plastic deformation magnetic actuation by Langer, J.-C., Zou, J., Liu, C., Bernhard, J.T.

“…A new reconfigurable out-of-plane microstrip patch antenna is presented. Using micromachining processes, a microstrip antenna designed for operation around 26…”
Get full text

A smart mechanically actuated two-layer electromagnetically coupled microstrip antenna with variable frequency, bandwidth, and antenna gain by Bernhard, J.T., Kiely, E., Washington, G.

“…Experimental results are presented on a tunable mechanically actuated microstrip antenna with a parasitic director. A novel piezoelectric actuation system is…”
Get full text

Investigation Into the Relationship Between Microstrip Patch Width and Efficiency by Siwen Yong, Bernhard, J.T.

“…The equation W = lambda/radic(2(epsiv r + 1)), which determines the best length for an efficient slot radiator, is frequently used to determine the best width…”
Get full text

Guest Editorial for the Special Issue on Multifunction Antennas and Antenna Systems by Papapolymerou, J., Bernhard, J.T.

Get full text

Signal Flow Graph for a Probe-Fed Microstrip Patch Antenna by Ruyle, J.E., Bernhard, J.T.

“…Complex coupling environments are difficult to represent analytically. Signal flow graphs offer an analysis method for such networks, allowing network elements…”
Get full text

On the Radiation Characteristics of Right- and Left-Handed Microstrip Patch Antenna Designs by Fladie, J.A., Bernhard, J.T.

“…Theoretical left-handed materials have been shown to reduce the size of a resonant microstrip antenna while maintaining or increasing impedance bandwidth. This…”
Get full text

Improvements in the performance of microstrip antennas on finite ground planes through ground plane edge serrations by Huff, G.H., Bernhard, J.T.

“…This paper explores how edge serrations on a truncated ground plane affect the performance of a microstrip antenna. The investigation includes both simulations…”
Get full text

An integrated active microstrip reflectarray element with an internal amplifier by Clark, R.W., Huff, G.H., Bernhard, J.T.

“…A new active microstrip reflectarray element (unit cell) with an internal microwave integrated circuit amplifier is introduced. The amplifier resides in a…”
Get full text

Ground plane edge serrations for improved performance of microstrip active reflectarray elements by Cung, G., Huff, G.H., Bernhard, J.T.

“…The paper investigates the effects of ground plane edge serrations on microstrip patch antennas for use in active-element reflectarray applications…”
Get full text

K-band phased array antennas based on Ba/sub 0.60/Sr/sub 0.40/TiO/sub 3/ thin-film phase shifters by Romanofsky, R.R., Bernhard, J.T., van Keuls, F.W., Miranda, F.A., Washington, G., Canedy, C.

“…This paper summarizes the development of a prototype 23.675-GHz linear 16-element scanning phased array antenna based on thin ferroelectric film coupled…”
Get full text

Tuning Method for a New Electrically Small Antenna With Low [Formula Omitted] by Adams, J.J, Bernhard, J.T

Get full text

Author's reply by Bernhard, J.T.

Get full text